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關(guān)注：1
2013-05-23 12:21
求翻譯：Because of the relatively low concentration of gold and platinum metals in the earth's是什么意思？ 待解決
 懸賞分：1
- 離問(wèn)題結(jié)束還有
Because of the relatively low concentration of gold and platinum metals in the earth's
問(wèn)題補(bǔ)充： |
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